Calculating-machine



J. R. MONROE. CALCULATING MACHINE.

APPLICAHUN mu) Auu 3. M11

.Patenhul June 10, 1919.

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JW 24) 6014mm J. R. MONROE. CALCULATING MACHINE.

APPLICATION FILED AUG.3. 1914.

3,513 aVZdM/a J. R. MONROE.

CALCULATING MACHINE.

APPLICATION FILED AUG. 3, 19M

1,306,606. ParenLedJune [Q1919 4 SHEUS SHEET J. R. MONROE.

CALCULATING MACHINE. APPLICATION FILED AUG.3. 1914.

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JAY B. MONROE, NEW YORK, N. Y., ASSIGNOR TO MONROE CALCULATING MACHINE vCOMPAN Y, OF NEW YORK, Y., A CORPORATION OF NEW YORK.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented June 10, 1919.

Application filed August 3, 1914. Serial No. 854,687.

T all whom it may concern:

Belt known that I, J AY R. MONROE, a citizen of the United States,resident of- New York, in the county of New York and State of New York,have made a certain new and useful Invention in Calculating-Machines;and I declare the following to b afull,

' clear, and exact description of the same,

such as will enable others skilled in the art to which it ap ertains tomake and use the invention, refgrence being-had to the accompanyingdrawings, and to letters or figures of reference marked thereon, whichform a part of this specification.

Figure 1 is a plan view of a calculating machine, partly broken away,showing the invention in section on the line 11, Fig. 3.

Fig. 2 is a composite sectional view on the lines 2'-2', 2 2 2 -2 Fig.3. The line of section is indicated at a'r-m,

Fig. 1. I

ig. 3 is a section on the line 33, Fig. 1. Fig. 4 is a detail plan view,partly broken away, of the lever for operatin the rock bars to releasdepressed keys, an the means for actuating said lever, the pivotal endof the slide being in operative position.

Fig. 5 is a similar view, with the pivoted end of the slide turned toinoperative posi cam end of the lever.

Fig. 6 is a detail end view of the. crank arm of the operating shaft.

Fig. 7 .is a detailside view of the same.

tion and the cam 17 shown as opposite the 8 is a detail end view of thesecond crank arm of the operating shaft.

Fig. 9 is a detail side view of the same.

Fig. 10 is a detail plan view of the slide,

thereof in inoperative position. I

Fig. 11 is a detail side view of the slide.

Fig. 12 is a detail plan view of the pivoted end of the slide and of theturn button to move the slide into and out of operative position. I IFig. 13 is a detail side view of thesame.

The invention has relation to calculating machines, and particularly tothe keyboard thereof, having for its object the provision of improvedmeans ,for releasing and returnigg to normal position all keys depressOther objects and advantages will harem;

after'appe'ar.

In theaccompanying g-drawings, illustrating the invention, the numeral 1designates the numeral keys of the machine, operating rocking members 2,to move differential actuating or primary calculating wheels 3, thelatter operated for the performance of arithmetical problems all asdescribed at length in the patent to Baldwin, dated December 2, 1913,Number 1,080.245.

The members of each denominational series of keys are provided with arock bar 4, common to all members of the series, said bar havingpreferably depending end arms 1, pivoted at their lower ends at 5, thebar being operated by a spring 6 and having a top 7 ngaged normally atone edge thereof with notches 8' of the key stems 9, said notches havingeach a beveled upper wall 10, which in the depression of the key willact to rock the bar, whereby, when the key reaches the limit of itsdepression, the bar will be can gaged, through the medium of its spring,with'an upper notch 11 of the key stem, to hold the key in depressedposition.

Means are provided to rock all of the bars 4 and release all of thedepressed keys of the different denominational series, upon rotation orturning of the operating crank handle of the machine in registering,said means consisting usually of a slide 12, located above and at rightangles to the bars 1 and having depending pins 13, engaging the tops ofsaid bars, a horizontal lever 14 at one end of the machine being pivotedat one end at 15 and having an opposite cam end 16, engaged by a cam 17of a crank arm 18 of the operating shaft 19, in the turning of saidshaft by its handle, said lever havmg intermediately of its lengthcontact with a pin 20, located at the end of said slide, to move theslide endwise and release all of said bars and thereby release alldepressed keys, which a are returned to normal position by theirsprings.

Means are provided whereby the operating shaft may be turned withoutmoving said slide and releasing the keys, consisting preferably of apivotal end 21 of the slide, said pivotal end carrying-the pin 20 andbeing adapted to be turned to one side upon its pivot, out of the way ofsaid lever in the operation thereof by the shaft 19. An operating knob21, upon its pivot pin and projectin without the casing of the machine,contro s the position of this pivotal end.

' Means are provided for the operation of andto the carrying operationupon the in the slide and release of all depressed keys at any timedesired, independently of the turning of the shaft 19, and consistingusually of a depressible key 22, operating a bell-crank lever 23, saidlever having engagement with the end of a lever 24, pivotedintermediately of its length at 25, the opposite end of said leverhaving contact with a pin 26 of said slide to shift the slide endwiseupon depres-' carrying members j, said primary wheels:

constituting the connecting elements in a direct train of gearconnections from the operating shaft to the numeral wheels 13. Reversalof the direction of rotation of the operating handle will thuscausereverse movement of the wheels 13, such wheels being operated inone direction in the solution ofproblems in addition and multiplication,

and ina reverse direction insubtraction and division.

The operating tram includes a mutilated gear 80, designed to allow ineach rotation an idle or inoperative half-turn ofthe operating handlewith relation to the primary calculating wheels. In forward rotation ofthe handle this half-turn, being the latter half of each rotation,brings carrying members j into operative relation with the intermediategears, as fully described in the patent to Baldwin hereinbefore referredto. Obviously, from the starting position illustrated, movement of thehandle'in one direction will immediately communicate move ment to gears3, while reverse movement of the handle will be idle with respectthereto termediate gears during the first half-turn, after which thesequence of operations during repeated rotations is the same as inforward movement. a

To meet these conditions of operation the crank arm 18 of the operatingshaft is loose upon the arm 18, and connection is made to turn the shaftthrough the medium of a second crank arm 28, fast upon the shaft andhaving a pin 29 engaging a pin 30 of the arm 18. Owing to thisarrangement, the pin 29 will not push the pin 30 and arm 18 ast thepoint of contact with cam 16 at the beginning of any rotation', forwardor reverse. Thus the operating shaft is allowed to turn in one directiona three-fourths turn, or 270 degrees from the startingpositionillustrated in Fig. 3, before operating the lever to move theslide, and in the other direction to turn 50 degrees, or a turn and aquarter, before operation of the lever and slide, it being designed thatthe a slide shall not be operated until the primary 7 lem and in areverse direction for another problem including an operating devicemovable from normal position in either of two'- directions, and meanscooperating with'said operating device and capable of moving saidretaining means to release said keys only after the actuation of saidregistering mechanism in the movement of said device from normalposition in either direction.

2. In a' calculatng machine, spring retracted numeral keys, means forretaining said keys in depressed position, selecting elements movable toset up position u on depression of said'keys, registering mec amsm,means for actuatingsaid registering mechanism 1n one direction for oneproblem and in a reverse direction for another prob lem including anoperating device movable fromnormal position in either of twodirections, and means cooperating with said operating-device and capableof moving said retaining means to release said keys only after theactuation of said registering mechanism in the movement of said devicefrom normal position in either direction, and ineluding a member capableof being set to key-release or non key-release position prior to theoperation of said'device.

3. In a calculating machine, spring retracted'numeral keys,-means forretalning said keys in depressed position, selecting elements movable toset up position upon depression of saidkeys, registering mechanism,means for actuating said registering mechanism in one direction for oneproblem and in a reverse direction for another problem, including anoperating shaft rotatable from normal position in either direction, andmeans cotiperating with said operating shaft and capable of moving saidretaining means to release said keys only after the actuation of saidregistering mechanism in the movement of said shaft from normal positionin either direction, and including a crank fast upon said shaft andhaving a; pin, a crank loose'upon said shaft and having a pin eny thepin of the fast crank, and a i portion engaged caged lever having adouble cam by said loose crank. v v

4. In a calculating machine, spring re- 'tracted numeral keys, means forretaming said keys in depressed position, selecting elements movable toset up position upon depression of said keys, registering mechanlsm,means for actuating said registering mechanism in one direction for oneproblem and in a reverse direction for another problem, including anoperating device rotatable in either direction and having upon reversala limited inoperative movement prior to its operative movement, andmeans cooperating with said operating device and capable of moving saidretaining means to release said keys only upon operative movement ofsaid device.

5. In a calculating machine, spring retracted numeral keys, means forretaining said keys in depressed position, selecting elements movable toset up position upon depression of said keys, registering mechanism,means for actuating said registering mechanism in one directlon for oneproblem and in a reverse direction for another problem, including anoperating device rotatable in either direction and having upon reversala limited inoperative movement prior to its operative movement, andmeans cooperating with said operating device and capable of moving saidretaining means to release said keys only upon operative movement ofsaid device, and including a member capable of being set to key-releaseor non key-release position. prior to the operation of said device.

6. In a calculating machine, spring retracted numeral keys, means forretaining said keys in depressed position, selecting elements movable toset up position upon depression of said keys, registering mechanism,means for actuating said registering mechanism in one direction for oneproblem and in a reverse direction for another problem, including anoperating shaft rotatable in either direction and having upon reversal alimited inoperative movement prior to its operative movement, and meanscooperating with said operating shaft and capable of moving saidretaining means to release said keys only upon operative movement ofsaid shaft, and including a crank fast upon said shaft and having a pin,a crank loose upon said shaft and having a pin engaged by the pin of thefast crank, and a lever having a double crank portion engaged by saidloose crank.

In testimony whereof I affix my signature, in presence of two witnesses.

JAY R. MONROE.

\Vitnesses:

CHAS. M. Cross, IRVING CoYNE.

